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Binding selectivity of Ca2 + over Na+ and various advantage terms as functions of z for the indicated values of ϵpr. The other variables are held fixed: c Ca 2+(B)=10−6 M, c Na +(B)=30 mM, and R = 3.5 Å. The MFI, MFD+SCD, SELF, ION, and DIEL electrostatic terms are shown.
